Put 1 on today smoothed out any rough idle and delivers smooth strong power. pleased with the results.Picked up the msd6 with the soft touch rev control today from e-bay for 112.00 Ill show pics of installation

bigger wires are better, yep but i think 8.5 or 8.0 (can't remember)is the limit, anything beyond that will not conduct as effecient they say cuz there is too much material to pass electricity through.

No the old coil is fine but the blaster was good but it wound up fast without burnen (combustion) so now that the msd 6 is worken its like alot healthier all the way through and I have to say I dont have to put my foot in it to get goin so .. Im happy once again.

No what it was , wasnt the old coil but my timing belt got stuck on the crank. just quite runnen it took me awhile to figure out the cam wasnt turnen when i tried to start it
the teeth on the cam belt were coming off all around the belt in spots of 3 or 4 1 and 2 and finally 6 and 7 teeth at a time it gave outstalling not turnen the crank so i think it ran a rough because of the changes in timing
whenever it hit a spot with out teeth its just floaten across it happend one day right when i got to work but before that it just stalled on me 1 or 2 and i lifted up the hood checked the battery and the transisterized ignition and started ut up .
This just means dont buy cheap belts OK

I made my own wires by using MSD long, straight plug boots and Taylor SpiroPro 8mm wires. They fit great, look great, and have very little resistance. The motor seemed to run slightly better with them.

Hey Vaughan. Are you running an MSD coil on your 931? Does it affect the Digital Ignition System at all?

No, the 931 ignition is still all stock (original) stuff - haven't gotten to messing with that. However, I'd say that, on a Series II turbo, there's basically no need for an MSD system... IMO...

I did just recently put a Permatune CD ignition on the racecar... it's nicer than the MSD's in that it's a plug-n-play replacement - plugs into the stock wiring harness, no need for much modification at all. Downside, it cost much more. Porsche used the Permatune ignition on some early-80's 911's, BTW.

One downside sometimes of installing a good aftermarket CD ignition is that they can bring out and make more apparent problems in what remains of the stock system. I found this to be the case with my racecar after intalling the Permatune; screaming down the back straight at Mid-Ohio, the engine has an occasional misfire at about 5000rpm. It continues to pull strong through, revving up to about 100mph going into the braking zone. It just does suck to lose that bit of pull... I believe it's due to a bad signal wire from the distributor to the ignition unit